I would tend to think the solicitors would be assistant managers rather than the minimum wage people - they probably just hit everyone with the non-compete on principle. But the people who solicit know whom to speak with as well as which accounts order often; both those things might be worth something as otherwise one is reduced to dropping off menus. For us, I think Jimmy Johns is one of the places where we are billed monthly, but I may be wrong as most of the time I have the food ordered it's because salesmen are paying for it. And when it is otherwise, I've never asked if we charge it to our account or put it on our credit card.
Either way, if we have someone who has always provided good service at Jimmy Johns and she leaves, we would try her new employer. But then we try most delivery places that solicit us, and using one depends more on the quality level of food and service since those of us who have food ordered usually (though not always) specify the place or at least the type of food.
It's an interesting question, I'll have to remember to ask our secretary about her procedure.